/*  portVideo, a cross platform camera framework
    Copyright (C) 2005 Martin Kaltenbrunner <mkalten@iua.upf.es>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "FrameDiff.h"

void FrameDiff::process(unsigned char *src, unsigned char *dest) {
	// frame difference
	int temp;
	int threshold = 15; 
	for (int i=0;i<srcSize;i++) {
		//temp = backgroundFrame[i] - *src++;
		temp = backgroundFrame[i] - *src;
		temp = ( temp < 0 ) ? -temp : temp;
		if( temp > threshold)
			//*dest++ = *src;
			*dest++ = 255;
		else
			//*dest++ = (unsigned char) temp;
			*dest++ = 0;
		src++;
	}
}

void FrameDiff::setBackgroundFrame(unsigned char *bgrFrame) {
	backgroundFrame = bgrFrame;
}
